The 68M4-20 from ARRA Inc. is a RF Variable Attenuator with Frequency 8 to 12.4 GHz, Attenuation Range 20 dB, Power 5 w, Peak Power 3 kW, Insertion Loss 0.5 dB. Tags: Module with Connectors, Continuously Variable, Rotary, Motorized. More details for 68M4-20 can be seen below.